Laserfiche WebLink
type of systems, which enables the larger (typically) <br />valve to actuate only in the event of a downstream <br />pressure drop below the smaller valve's setting. <br />Quality Assurance steps: IDM will perform a review <br />of db tables to ensure that data sets and scenarios <br />have been populated accurately as per the initial <br />table and model notebook development IoM will <br />then run simulations for the full 24 -hour EPS to <br />evaluate convergence abilities, and apply Range <br />Reports and Graphs to determine pressure, pump <br />flow and tank level ranges preliminarily. <br />Where convergence is an issue, IDM will evaluate the <br />hydraulic notepad report generated by WaterGEMS <br />and consider take appropriate action to achieve <br />convergence and stability, Hydraulic parameters may <br />be adjusted within an acceptable tolerance, Input <br />errors may be found, and control set points may be <br />redefined as part of this process. After resolving <br />hydraulic issues, hydraulic model software <br />parameters may also be applied to assist with <br />convergence, such as simulation option relaxation <br />factors and/or damping limits. IDM offers extensive <br />experience in the prudent application of these <br />advanced modeling software parameters. <br />typically applied for planning simulations, while EPS <br />calibrations are used for energy and water quality <br />evaluations. <br />Both hydrant tests require City time, resources, and <br />equipment, and therefore It Is important to develop a <br />Hydrant Testing Plan for efficiency, while also <br />minimizing liability when in the field. This Plan will <br />assist the City in identifying data, . system, hardware, <br />and staffing resources required to support the <br />process. Factors considered in this plan include but <br />are not limited to, <br />Plant & Calibrate- This stage of the projects * Day, time and frequency ofhydranttests <br />prepares plans for both Steady State and Extended * Number and location of data paints <br />Period Simulation Calibrations, then calibrates to * Equipment required, such as walkie- talkies, clip <br />projectgoais and tolerances. boards, data loggers, flow diffusers <br />Calibrating operational hydraulic <br />* Specific instructions ra. nozzle used, . location of <br />models will connect engineering hydrant, directions, ato, <br />and operations with a tool that * Specific data needed from SCADA, Including <br />format, interval, and duration <br />0 simulates operator experience , Expectations of the calibration and validation <br />Through this connection, relative to pressure, ilows,tank level tolerances <br />Through this connection, the <br />model can be utilized to optimize! * Varying boundary conditions considered for <br />operations and maintenance, while bringing increased validation and expected calibration tolerances <br />value to projects. This Project will calibrate for 2 Hydrant Testing Map (See next page) <br />driving conditions: maximum day demand and IDM has reviewed the City's GIS layer and developed <br />average day demand. Maximum day demand a preliminary hydrant testing plan with the following <br />conditions are typically used for planning and energy Considerations: <br />simulations, while average day simulations are <br />typically applied for water quality simulations. * High teak Areas <br />Additionally, this project will calibrate for 2 time * Pipeline Material, specifically Cast Iron pipe <br />conditions: steady state, considered a snapshot in <br />time, and extended period simulation (EPS) for a <br />duration of 72- hours. Steady state calibrations are <br />IDMODELING10 12 <br />we can hs more, togeN*s. <br />25D -16 <br />